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Wave 4 Cohort 1 participants' uptake of offer to complete the questionnaire by pen and paper, web or telephone interview
| Questionnaire mode | N (%) |
|---|---|
| Postal (pen and paper) | 759 (72.5) |
| Web based | 263 (25.1) |
| Telephone administered | 20 (1.9) |
| Total complete questionnaires | 1047 |
